Detections
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FreeBSD : cups-filters -- remote code execution (24375796-7cbc-11ef-a3a9-001cc0382b2f)
high Nessus Plugin ID 207895
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Synopsis
The remote FreeBSD host is missing one or more security-related updates.Description
The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 24375796-7cbc-11ef-a3a9-001cc0382b2f advisory.OpenPrinting reports:
Due to the service binding to *:631 ( INADDR_ANY ), multiple bugs in cups-browsed can be exploited in sequence to introduce a malicious printer to the system. This chain of exploits ultimately enables an attacker to execute arbitrary commands remotely on the target machine without authentication when a print job is started.
Posing a significant security risk over the network. Notably, this vulnerability is particularly concerning as it can be exploited from the public internet, potentially exposing a vast number of systems to remote attacks if their CUPS services are enabled.
The vulnerability allows an attacker on the internet to create a new printer device with arbitrary commands in the PPD file of the printer. Attacks using mDNS on the local network can also replace an existing printer. The commands are executed when a user attempts to print on the malicious device. They run with the privileges of the user cups.
It is recommended to disable the cups_browsed service until patches become available. On FreeBSD this is the default. You can check the status and disable the service with the following commands:
# service cups_browsed status # service cups_browsed stop # service cups_browsed disable If you choose to leave the service enabled, attacks from the internet can be blocked by removing the cups protocol from the BrowseRemoteProtocols and BrowseProtocols directives in /usr/local/etc/cups/cups-browsed.conf. Attacks using mDNS can be blocked by removing the dnssd protocol as well. Access can be limited to specific IP addresses using BrowseAllow, BrowseDeny, and BrowseOrder directives as documented in cups-browsed.conf(5). Then restart the service with the following command:
# service cups_browsed restart
Tenable has extracted the preceding description block directly from the FreeBSD security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected packages.See Also
Plugin Details
Severity: High
ID: 207895
File Name: freebsd_pkg_243757967cbc11efa3a9001cc0382b2f.nasl
Version: 1.3
Type: local
Family: FreeBSD Local Security Checks
Published: 9/28/2024
Updated: 11/25/2024
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.7
CVSS v2
Risk Factor: High
Base Score: 8.5
Temporal Score: 7
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:C/A:N
CVSS Score Source: CVE-2024-47076
CVSS v3
Risk Factor: High
Base Score: 8.6
Temporal Score: 8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C
CVSS Score Source: CVE-2024-47175
Vulnerability Information
CPE: p-cpe:/a:freebsd:freebsd:cups, cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:cups-filters
Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 9/27/2024
Vulnerability Publication Date: 9/26/2024
Exploitable With
Metasploit (CUPS IPP Attributes LAN Remote Code Execution)